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From: Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: Can 'graphics' be a file descriptor?
Date: Wed, 01 Jan 2025 01:29:52 -0800
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wij <wyniijj5@gmail.com> writes:
> In recent revision of libwy (a C++ library that wraps Clib functions), I feel
> the so called 'graphics' can be a file descriptor.

A file *descriptor* is a small integer referring to some file-like
entity, used with open/close/read/write.  There's no such thing in
standard C; it's a POSIX concept.

I don't think you're actually working with file descriptors, though it's
hard to tell.

>   if((r=popen(GrSvr,cpid,frd,fwr))!=Ok) {
>     WY_THROW(r);
>   }

popen() is a POSIX function.  It takes two arguments, not four.

The code you posted is C++.  Why are you posting it to comp.lang.c?

[...]

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */